USB: add Freescale high-speed USB SOC device controller driver

Freescale high-speed USB SOC can be found on some Freescale processors
among different architectures.  It supports both host and device functions.
This driver adds its device support for Linux USB Gadget layer.
It is tested on MPC8349 and MPC8313, but should work on other platforms
with minor tweaks.  The driver passed USBCV 1.3 compliance tests.  Note
that this driver doesn't yet include OTG support.
Signed-off-by: NLi Yang <leoli@freescale.com>
Signed-off-by: NJiang Bo <tanya.jiang@freescale.com>
Signed-off-by: NBruce Schmid <duck@freescale.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/Kconfig

@@ -68,6 +68,27 @@ choice
 	   Many controller drivers are platform-specific; these
 	   often need board-specific hooks.
 
+config USB_GADGET_FSL_USB2
+	boolean "Freescale Highspeed USB DR Peripheral Controller"
+	depends on MPC834x || PPC_MPC831x
+	select USB_GADGET_DUALSPEED
+	help
+	   Some of Freescale PowerPC processors have a High Speed
+	   Dual-Role(DR) USB controller, which supports device mode.
+
+	   The number of programmable endpoints is different through
+	   SOC revisions.
+
+	   Say "y" to link the driver statically, or "m" to build a
+	   dynamically linked module called "fsl_usb2_udc" and force
+	   all gadget drivers to also be dynamically linked.
+
+config USB_FSL_USB2
+	tristate
+	depends on USB_GADGET_FSL_USB2
+	default USB_GADGET
+	select USB_GADGET_SELECTED
+
 config USB_GADGET_NET2280
 	boolean "NetChip 228x"
 	depends on PCI

drivers/usb/gadget/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_USB_GOKU)		+= goku_udc.o
 obj-$(CONFIG_USB_OMAP)		+= omap_udc.o
 obj-$(CONFIG_USB_LH7A40X)	+= lh7a40x_udc.o
 obj-$(CONFIG_USB_AT91)		+= at91_udc.o
+obj-$(CONFIG_USB_FSL_USB2)	+= fsl_usb2_udc.o
 
 #
 # USB gadget drivers